vigil vs spying

vigil and spying both are nouns.

Word	Noun	Adjective	Verb	Adverb
vigil	Yes	No	No	No
spying	Yes	No	No	No

As nouns, spying is a hyponym of vigil; that is, spying is a word with a more specific, narrower meaning than vigil:

Other hyponyms of vigil include continuous receiver watch, listening watch, overwatch.

vigil (noun)	spying (noun)
a purposeful surveillance to guard or observe	the act of keeping a secret watch for intelligence purposes
the rite of staying awake for devotional purposes (especially on the eve of a religious festival)	keeping a secret or furtive watch
a period of sleeplessness	the act of detecting something; catching sight of something